Retarding Effects of Cyclodextrins on the Decomposition of Organic Isothiocyanates in an Aqueous Solution
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概要
- 論文の詳細を見る
One- and two-dimensional 1H nuclear magnetic resonance (1H NMR) spectra were measured in order to estimate the dissociation constants (Kdiss) and molecular geometries of cyclodextrin (CD) with three organic isothiocyanates (ITC), allyl-ITC, 3-butenyl-ITC, and 4-pentenyl-ITC, in an aqueous solution (pH 5.0, Ic=0.75 M). In every ITC, the Kdiss values decreased in the order of α-CD>β-CD>γ-CD, and the three rod-like linear molecules of ITCs were accommodated with the best fit into the smallest cavity of α-CD. By rotating-frame nuclear Overhauser enhancement spectroscopy, cross peaks were found between the H-3 of α-CD and the H-1 of AITC. From the result, the molecular geometry of α-CD–AITC complex presume that the isothiocyanate group of AITC is located some where around the wideing rim and a hydrophobic allyl group is included within the hydrophobic cavity of α-CD.
- 社団法人 日本農芸化学会の論文
- 2004-03-23
著者
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Ohta Y
Hiroshima Prefectural Food Technology Research Center
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Ohta Yoshio
Hiroshima Prefectural Food Technology Research Center
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川岸 舜朗
Department Of Food And Nutrition Sugiyama Jogakuen University
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川岸 舜朗
名古屋大学
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川岸 舜朗
Emeritus Professor Of Nagoya University
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OSAWA Toshihiko
Nagoya University Graduate School of Bioagricultural Sciences
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MATSUI Yoshihisa
Department of Life Science and Biotechnology Faculty of Life and Environmental Science Shimane Unive
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KAWAKISHI Shunro
Nagoya University
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Matsui Yoshihisa
Department Of Life Science And Biotechnology Fuculty Of Life And Environmental Science Shimane Unive
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Matsui Yoshihisa
Department of Agricultural Chemistry, Faculty of Agriculture, Shimane University
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